Lignin belongs to which class of secondary metabolites?
C fits best: Phenolics. Keep the PSS- Sec G- Sec metabolites basics straight and Phenolics stands out as the precise answer. Avoid: A) Alkaloids; B) Terpenoids; D) Glucosinolates. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
